Hydraulic TOB / internal slave Getrag to 4.9 swap. (Page 7/7)
Raydar JUN 16, 11:35 AM
My 4T60E worked out to around 2.97. I forget what combination of gear ratio and sprocket ratio I had, but it was one that was not easily upgradeable without switching sprockets. Mine was quick for what it was, but I always wanted more. If I was doing it over again, I would insist on the Eldo ratio (3.33).

My Getrag is the 3.61(?). I specifically didn't want the 3.94 in combination with the tractor motor.

[This message has been edited by Raydar (edited 06-16-2011).]

mattwa JUN 16, 12:00 PM

quote
Originally posted by Raydar:

My 4T60E worked out to around 2.97. I forget what combination of gear ratio and sprocket ratio I had, but it was one that was not easily upgradeable without switching sprockets. Mine was quick for what it was, but I always wanted more. If I was doing it over again, I would insist on the Eldo ratio (3.33).

My Getrag is the 3.61(?). I specifically didn't want the 3.94 in combination with the tractor motor.




2.97 is sounds correct, its the 37/33 chain with the 3.33 diff. I have the 37/33 chain with the 3.06 diff. And yes there was no way to upgrade yours unless you changed to 35/35 sprockets, like I want to.

[This message has been edited by mattwa (edited 06-17-2011).]

Raydar JUN 16, 11:00 PM
FWIW...
I believe that Racer JT had 3.42s in his 4T60E. I believe the only 4T60E (not really sure about the "E") that came with 3.42s was the Z34 and other 3.4 DOHC cars.
I'm not sure if that's what he had, or it it was cobbled together using a Caddy tranny.
There is also the possibility of 3.73s with the correct combination of parts. I'm not sure if it's ever been done with the 4T60E, but I believe the parts are out there.
It definitely has been done with a regular 4T60. I was considering doing that with my 3.4 before I swapped in the Getrag.
mattwa JUN 17, 02:36 AM
.

[This message has been edited by mattwa (edited 12-28-2011).]

mattwa JUN 17, 02:37 AM
Sorry, I'm done hijacking your getrag swap thread with automatic talk.


edit:double post, crap ,sorry.

[This message has been edited by mattwa (edited 06-17-2011).]

jtsordel JUN 17, 02:54 AM
Fieroseverywhere has a Getrag in his 4.9 and has a novel solution for the crossover pipe dilemma. He cobbled it together from 2 Caddy crossover pipes... Maybe PM him about it?

Thanks!!!

Josh
Raydar JUN 17, 08:35 AM
Matt...
No worries. It's stuff that someone may be able to use.
I was going to post a link to a similar chart, but didn't have time.


quote
Originally posted by jtsordel:
Fieroseverywhere has a Getrag in his 4.9 and has a novel solution for the crossover pipe dilemma. He cobbled it together from 2 Caddy crossover pipes... Maybe PM him about it?
Thanks!!!

Josh



Thanks Josh.
It's pretty much covered, though. As soon as I can get it to whodeanie.
He's done some really nice headers. A crossover pipe ought to be easy for him.

First order of business is getting the A/C vacuumed down and charged. It's supposed to be 93 here, today.

[This message has been edited by Raydar (edited 06-17-2011).]

Fieroseverywhere JUN 17, 09:30 AM

quote
Originally posted by jtsordel:

Fieroseverywhere has a Getrag in his 4.9 and has a novel solution for the crossover pipe dilemma. He cobbled it together from 2 Caddy crossover pipes... Maybe PM him about it?

Thanks!!!

Josh



I don't know if its "cobbled together" so much. As you said, I used 2 caddy cross over pipes. I cut the flanges off both. One I cut right at the flange, the other right before the first bend after the flanges. Then weld the longer flanges to the longer pipe. Its perfect for getrag shift cable clearance and you get to keep the factory heat shield.
Raydar JUN 17, 08:23 PM

quote
Originally posted by Fieroseverywhere:


I don't know if its "cobbled together" so much. As you said, I used 2 caddy cross over pipes. I cut the flanges off both. One I cut right at the flange, the other right before the first bend after the flanges. Then weld the longer flanges to the longer pipe. Its perfect for getrag shift cable clearance and you get to keep the factory heat shield.



Thanks for the tip. Unfortunately, I don't even have one Caddy crossover, since this was a custom Y-pipe, made to bolt up to a stock Fiero system.
But it's all good. I talked to Dean just a while ago. Going to take it up there tomorrow.

Having said all that...
This stupid Y-pipe issue was the only really ugly issue that came up, during the entire swap. And that's only because I can't bend or weld pipe. Everything else went pretty much as I would have expected.
Raydar JAN 06, 06:50 PM
Update...
I updated the original post with a couple of things I learned, after doing this install.

Reader's Digest version: If you are using the HTOB Getrag (aka T550) you will need the clutch designed for the Cavalier with the 3.1 and the T550 trans.
The Fiero clutch is "too tall", and places the release fingers too close to the release bearing.

Also, the "dish" in the flywheel is not wide enough for some clutches. Will work fine with others.
I alerted Tom at LSC about it, and he assured me that the situation would be resolved with subsequent products.

Thanks to Cliff for "un-archiving" my thread.